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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

Both (A) and (B)
To give maximum space and strength
None of these
To withstand the pressure of steam inside the boiler

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Twice
Three times
Four times
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

50°C and normal atmospheric pressure
50°C and 1.1 bar pressure
100°C and normal atmospheric pressure
100°C and 1.1 bar pressure

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of steam turbines may be improved by

Reheating of steam
Regenerative feed heating
Binary vapor plant
Any one of these

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Steam Boilers, Engines, Nozzles and Turbines
At which pressure the properties of water and steam become identical

100 kg/cm²
225.6 kg/cm²
0.1 kg/cm²
1 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
A single acting steam engine produces ___ power than that of double acting steam engine.

Double
Half
Four times
Equal

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